超宽带通信中的伪混沌脉冲位置调制  

Pseudo chaotic pulse position modulation in UWB communications

作　　者：向新[1,2] 王杰令[2] 曾志斌[2] 易克初[2] 陈顺方[3] 

机构地区：[1]空军工程大学工程学院,陕西西安710038 [2]西安电子科技大学综合业务网国家重点实验室,陕西西安710071 [3]中国航空无线电电子研究所航空电子系统综合技术国防科技重点实验室,上海200233

出　　处：《通信学报》2009年第11期106-112,共7页Journal on Communications

基　　金：航空科学基金资助项目(20095596014);陕西省自然科学基础研究资助项目(2009JM8001-4)~~

摘　　要：提出了一种新的适于超宽带脉冲通信的伪混沌脉冲位置调制方式(PCPPM),该方式采用符号动力学对混沌脉冲位置调制方式(CPPM)进行了改进,作为载波的脉冲串的相邻脉冲之间的间隔由混沌映射的符号动力学特性确定,采用脉冲位置调制方式对二进制符号进行调制。系统可以在无辅助握手的情况下获得同步。与CPPM相比,其降低了对脉冲间距的测量精度要求,适合数字方式实现。由于系统输出的脉冲间隔是随机分布的,具有近似噪声的频谱特性,最后对系统的性能进行了分析和仿真。A novel pseudo chaotic pulse position modulation（PCPPM） was proposed which was suitable for ultrawide-bandwith impulse radio communication systems, in this scheme, symbolic dynamics of a chaotic map was used for chaotic pulse position modulation（CPPM）, the separation between the adjacent pulses were determined by chaotic dynamics and binary information was modulated onto this carder by the pulse position modulation method. System could acquire synchronization automatically without any specific ＂hand shaking＂protocol. The advantages of PCPPM are decrease of the measurement precision of interpulse intervals and suitable for all digital solution. Since a random distribution of interpulse intervals, the resulting spectrum is a noise like spectrum. Finally, the performances of PCPPM were analyzed and simulated.

关 键 词：超宽带 混沌 符号动力学 性能 

分 类 号：TN911[电子电信—通信与信息系统]